The Influence and Optimization of Mixing Characteristics of Feed Based on Response Surface Methodology of Stirring Paddle Structure

Abstract

Suboptimal feed mixer designs cause nutrient heterogeneity and energy waste through inadequate turbulent flow. This study systematically examines how stirrer blade geometry governs turbulent kinetic energy and thermal homogeneity to enhance mixing efficiency. Initial single-factor testing established baseline parameters: 60° blade angle, 65 mm upper port diameter, 60 mm lower port diameter, and six blades. Response surface methodology optimized four critical variables: blade angle, upper/lower port sizes, and blade count, with each variable tested at three levels. The optimal configuration (39° blade angle, 54.9 mm upper port, 52.5 mm lower port, five blades) increased turbulent kinetic energy by 67% and elevated average fluid temperature by 7% versus conventional designs. These enhancements improve mixing uniformity by 23% and reduce energy consumption by 18%, establishing a validated design framework for efficient agricultural mixer engineering.